Physical and numerical analysis of the metal flow over the punch head in backward cup extrusion of aluminium

2006 ◽  
Vol 172 (2) ◽  
pp. 312-318 ◽  
Author(s):  
Rama Krishna Uyyuru ◽  
Henry Valberg
Keyword(s):  
Numerical Analysis ◽  
Metal Flow

scholarly journals Combined experimental and numerical analysis of a bubbly liquid metal flow

2017 ◽  
Vol 228 ◽  
pp. 012006 ◽  
Author(s):  
B Krull ◽  
E Strumpf ◽  
O Keplinger ◽  
N Shevchenko ◽  
J Fröhlich ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Liquid Metal ◽  
Metal Flow ◽  
Bubbly Liquid ◽  
Liquid Metal Flow

scholarly journals Influencing Factors of Void closure in Skew-Rolled Steel Balls Based on the Floating-Pressure Method

Materials ◽  
2019 ◽  
Vol 12 (9) ◽  
pp. 1391
Author(s):  
Chang Shu ◽  
Jitai Wang ◽  
Xuedao Shu ◽  
Duanyang Tian
Keyword(s):  
Numerical Analysis ◽  
Influencing Factors ◽  
Influencing Factor ◽  
Uniform Design ◽  
Metal Flow ◽  
Rolled Steel ◽  
Void Closure ◽  
Pressure Method ◽  
Steel Balls ◽  
Skew Rolling

Due to the instable conditions caused by the wear of rollers, macro voids inevitably occur in skew rolling steel balls. Macro voids in rolled balls greatly weakens the mechanical properties, resulting in the scrapping of about 23% of all skew rolling balls. This paper adopts the floating-pressure method (FPM) to eliminate macro voids in rolled steel balls, and mainly focuses on the investigation of the influencing factor void closure in skew-rolled balls. The research contents are listed as follows: Firstly, the mechanical model of FPM eliminating void in rolled steel balls is established, and the theoretical relationship between influencing factors of void closure is obtained. Then, the metal flow behaviors, the stress distribution and the effect of process parameters on void closure are revealed by numerical analysis. Subsequently, based on the uniform design method, the prediction equation of the required temperature and air pressure for compacting various inferior rolled balls with different diameter by FPM is deduced. Finally, the FPM experiment is carried out to verify the results of numerical analysis. The research results provide theoretical guidance for eliminating macro voids in skew-rolled steel balls.

Numerical Analysis of Four-Hole Extrusion of Aluminum Alloys

2009 ◽  
Vol 424 ◽  
pp. 173-179 ◽  
Author(s):  
W. Libura ◽  
Artur Rękas ◽  
D. Leśniak
Keyword(s):  
Numerical Analysis ◽  
Aluminum Alloys ◽  
Product Quality ◽  
Deformation Zone ◽  
Flow Direction ◽  
Metal Flow ◽  
Flow Analysis ◽  
Extrusion Process ◽  
Fem Simulations ◽  
6061 Aluminium Alloy

The work presents the results of FEM simulations of extrusion process with the use of four – hole dies of various geometry. The traditional flat dies and pocket dies were adopted for comparison. The calculations were conducted for indirect extrusion of rods of 14 mm in diameter from the 6061 aluminium alloy. The distributions of strains, stresses, metal velocities and temperature within the deformation zone were the basis for metal flow analysis. Based on the conducted calculations the die configuration, leading to the best product quality was recommended. The product quality was evaluated by the flow direction of rods from the die orifices.

Flash Design for Automatic Transfer System of Bearing Hub in Hot Forging Process

2006 ◽  
Vol 116-117 ◽  
pp. 120-123
Author(s):  
Sang Kon Lee ◽  
Hyun Sang Byun ◽  
Byung Min Kim ◽  
Dae Cheol Ko ◽  
C.G. Kang
Keyword(s):  
Numerical Analysis ◽  
Metal Flow ◽  
Hot Forging ◽  
Experimental Results ◽  
Transfer System ◽  
Forging Process ◽  
Hot Forging Die ◽  
Forging Die ◽  
Hot Forging Process ◽  
Forging Load

The aim of this study is to design flash geometry of bearing hub to apply the automatic transfer system in hot forging process. The flash geometry is very important in hot forging process because the flash geometry effects on the metal flow, material losses, forging load, die pressure and so on. In this study, the problem of designing the flash geometry is studied with flash thickness and width considering the maximum die pressure to apply an automatic transfer system in hot forging process for bearing hub. The numerical analysis was conducted by means of the commercial S/W DEFORM. On the basis of numerical analysis the flash geometry of hot forging die was redesigned, and experiment was conducted. From the experimental results, it was possible to produce bearing hub with an automatic transfer system without any deterioration of die lifetime.

Numerical Analysis of Rolling Extrusion Process of a Toothed Shaft from Titanium Alloy Ti6Al4V

2014 ◽  
Vol 622-623 ◽  
pp. 1215-1220
Author(s):  
Jarosław Bartnicki ◽  
Janusz Tomczak ◽  
Zbigniew Pater
Keyword(s):  
Titanium Alloy ◽  
Numerical Analysis ◽  
Metal Flow ◽  
Fem Analysis ◽  
Extrusion Process ◽  
Technological Parameters ◽  
Forming Process ◽  
Radial Forces ◽  
Titanium Alloy Ti6al4v ◽  
Deform 3D

This paper presents results of numerical calculations of rolling extrusion process of a toothed shaft made from titanium alloy Ti6Al4V. FEM analysis was conducted applying the software DEFORM 3D for the process chosen technological parameters. The kinematics of metal flow in the area of the formed teeth was analyzed. Distributions of stresses, strains and temperatures during teeth forming were determined. Calculated values of axial and radial forces and moments acting on rotating roll tools allow for designing of tools for experimental verification of the designed forming process.

Numerical Analysis of Rolling Extrusion Process of a Hollow Hub / Analiza Numeryczna Procesu Przepychania Obrotowego Piasty Drążonej

2012 ◽  
Vol 57 (4) ◽  
pp. 1137-1142 ◽  
Author(s):  
J. Bartnicki
Keyword(s):  
Numerical Analysis ◽  
Effective Stress ◽  
Experimental Verification ◽  
Effective Strain ◽  
Metal Flow ◽  
Three Dimensional ◽  
Extrusion Process ◽  
Design Tools ◽  
Extruded Product ◽  
Deform 3D

This paper presents the results of numerical calculations of rolling extrusion process of a hollow hub. Simulations were made by means of software Deform 3D in three dimensional state of strain. Distributions of effective stress, effective strain and damage criterion in the rolled extruded product were analyzed. Verification of metal flow during process allowed to design tools for experimental verification in PO-2 laboratory rolling - extrusion aggregate. For these needs also process force parameters were calculated.

Numerical Analysis of Feed Rate Influence on Hollow Hub Shape during Rolling Extrusion Process

2013 ◽  
Vol 572 ◽  
pp. 323-326
Author(s):  
Jarosław Bartnicki
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Numerical Analysis ◽  
Feed Rate ◽  
Metal Flow ◽  
Three Dimensional ◽  
Extrusion Process ◽  
Numerical Calculations ◽  
Forming Process ◽  
Additional Tool

This paper presents the results of numerical calculations of rolling extrusion process of a hollow hub. Due to the necessity of flanges manufacturing at both sides of the product, in the analyzed process of rolling extrusion, as additional tool limiting axial metal flow a rear bumper was implemented [1,. Numerical calculations of the hub forming process were conducted basing on finite element method, applying software Deform3D v.X in conditions of three dimensional state of strain. The obtained small shape faults, in the form of characteristic triangulation and small changes of the hub walls thickness, show that it is possible to conduct the further research works of experimental character, with the application of modernized aggregate for the rolling extrusion process PO-2.

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